A disconnect is open, but a worker does not lock out sources or test for voltage before touching conductors. What establishes a safe de-energized condition?
- Isolation, energy control, and verified absence of voltage
- BA stopped motor only
- CA dark pilot light
- DA verbal promise from another trade under the stated California contracting facts and documented project conditions
Why A is correct
The best answer is: Isolation, energy control, and verified absence of voltage. Control indications can fail and alternate sources can backfeed. A complete energy-control and verification process protects against unexpected energization. The new fact pattern changes the setting, not the governing rule or management control. The other choices either skip a required step, apply a different rule, or fail to address the stated risk.